Thanks lopbird33, I have found this site too, but I cant get it to work, I get an error message every time I try to select the other.artwork from the drop down list. I can continue regardless and it does export the files, but I have no way of reimporting them to put them back onto the iPhone.
Were your files in the format "other-extract-227"?
Edit:
I looked up how to run python scripts I found this helpfull
http://www.imladris.com/Scripts/PythonForWindows.html I now have the images exported....
Now to update 227 and import....
Edit again:
Updated 227 to be transpartent (well 1% opacity as 0% come up as white), this is the only change I have made to the Other.artwork file and have leant enough Python to import it in again. If anyone wants the file let me know...